Small correction- AC power doesn’t “travel in waves”. It just oscillates up and down with respect to its reference, and same with its current with respect to its impedance. Just looks like a wave if you look at its position over time.

With a completed circuit with low impedance, it would trip your breaker. With completed circuit with large enough impedance to not trip breaker, it might burn your apartment down in a number of ways. Could also kill neighbor if they are somehow making a return path, as current disrupts your nervous system where once they get caught in the shock they lose control of their muscles and are held in the current unable to let go, electrocuting them until death. If insulation is high enough to effectively be an open circuit, your neighbor on the pole wouldn’t know it was electrified in the same way a bird sitting up on a power line doesn’t have a clue its anything but a normal wire in the air. Largely depends on how the pole is installed and if its touching any metal or electrical wires where it is mounted on top, bottom, or both. Also if neighbor is ground level or if another apartment beneath them. A lot of variables create.a lot of possible outcomes.

Would not recommend, lot of risks with little to no chance of any reward